@MartinJohn88 - I'm guessing that a microphone for the lead driver is the fastest/easiest method, if connections allow. If first place is coming up on someone, and says "Leader coming up on Fibber McGee" or "Leader coming up on lurid purple car" or "Handlebar about to lap #44" it
may work. Even that system has plenty of flaws, I agree.
Without a mic, you hope that the guys getting lapped have memorized the numbers or different colors in their division so they know who's who, but to be honest, I think it's going to be awfully difficult to tell who's who and what lap the guy behind you is on. We've been told there is room to pass, so it must be there.
Whatever the conditions, do your best, no matter the combo. It's a game. I'm not going to get hot and bothered by anything that's likely to be brief. Even if it isn't going to be brief, this is still a game. We can vote our views on Sunday night.